To do 'The Dirty Guinness' one must down one's pint of Guinness then continue to thrust said empty pint glass into ones face, shattering it in the process.
Paddy O'Halloran: I can't make it into work today boss.
Boss: Why might that be Paddy?
Paddy O'Halloran: I only went and did The Dirty Guinness a few times last night, it was Finlay's stag do!
Boss: Good lad Paddy, I'll be seeing you tomorrow then.
Boss: Why might that be Paddy?
Paddy O'Halloran: I only went and did The Dirty Guinness a few times last night, it was Finlay's stag do!
Boss: Good lad Paddy, I'll be seeing you tomorrow then.
by paddy mc'shay February 17, 2011